class_docstr: A MultiObjectiveFunction class used to hold multi-objective functions.
docstr: Callable to avoid using the `pointer` property.
  
  Args:
      x: Array of positions.
  
  Returns:
      (float): Multi-objective function fitness.
docstr_tok: ["Callable","to","avoid","using","the","`","pointer","`","property",".","Args",":","x",":","Array","of","positions",".","Returns",":","(","float",")",":","Multi-objective","function","fitness","."]
code: def __call__(self, x: np.ndarray) -> float:
      """Callable to avoid using the `pointer` property.
  
      Args:
          x: Array of positions.
  
      Returns:
          (float): Multi-objective function fitness.
  
      """
  
      z = []
      for f in self.functions:
          z.append(f.pointer(x))
  
      return z
  
file_path: opytimizer/opytimizer/functions/multi_objective/standard.py
imports: from typing import List
  import numpy
  import opytimizer.utils.exception
  from opytimizer.core import Function
  from opytimizer.utils import logging
label_desc: Use image node_id 2 for calling the MultiObjectiveFunction obj's underlying member method code with example usage: obj.__call__(x) and returns: z